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tookaphotoof

Member Since: 18 Mar 2013
Location: dordrecht
Posts: 1279

2013 Defender 130 Puma 2.2 HCPU Santorini Black

Turn up the volume enough and soon you will never hear anything at all. Ever...

26th Jan 2016 5:56pm

hornet

Member Since: 04 Jan 2010
Location: Western Europe
Posts: 362

http://www.paddockspares.com/revotec-elect...-tdci.html

10th Feb 2016 8:34am

Cupboard

Member Since: 21 Mar 2014
Location: Suffolk
Posts: 2971

2011 Defender 110 Puma 2.4 HT Corris Grey

Wrong fan

10th Feb 2016 1:49pm

Wild Card 90

Member Since: 03 Dec 2014
Location: Gerlingen
Posts: 1060

2012 Defender 90 Puma 2.2 SW Indus Silver

Quite!

I have no problem with the viscous fan up front, and the Landy warms up quick enough. 1998 Tdi 90 SW,
2008 Td4 90 SW,
2012 2.2 90 SW,
2" raised Trailmaster/Terrafirma
Heavy Track Raids, 255 MT´s,
Recaro CS´s, anorak, wellingtons

10th Feb 2016 2:04pm

macfrank

Member Since: 05 Nov 2015
Location: somewhere in the north
Posts: 1111

2015 Defender 110 Puma 2.2 SW Keswick Green

Hi there,

it seems I'm as fussy as you

(However, I find the current MINI's ventilation far more annoying than the Defender's... And it has actually become worse compared to my first one of 2002.)

I wonder if a PMW-based electronic solution is really necessary. Currently the fan speed is controlled simply by two resistors. That's very Defender-like IMHO

Could we come up with a similar solution?

Click image to enlarge

On the highest setting, the resistors are bypassed. On "2" a 0.55 Ohm resistor is connected, and on the lowest setting a 0.45 Ohm resistor is added, to give a total of 1 Ohm.
Note the (NON/AIRCON) wiring. The looms are different, because the fan is switched on to the lowest setting if AC is switched on, even if the switch is in the off position (wow, there IS some intelligence in our Defenders, isn't there?)

So, thinking out loud, I'd say you could put another resistor/potentiometer in series with the 0.45 Ohm.
Questions remain: should we bypass the AIRCON wire because maybe the AC needs the currently designed fan speed? what are the resistor's power ratings, tolerance etc.?

10th Feb 2016 6:01pm

Wild Card 90

Member Since: 03 Dec 2014
Location: Gerlingen
Posts: 1060

Macfrank, thats what is needed! Just have to get the resistance value right. If possible leaving the AC out of it. Simple trick for a simple truck.......

1998 Tdi 90 SW,
2008 Td4 90 SW,
2012 2.2 90 SW,
2" raised Trailmaster/Terrafirma
Heavy Track Raids, 255 MT´s,
Recaro CS´s, anorak, wellingtons

10th Feb 2016 8:38pm

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